9343a1cd71
Since there have been major updates to both drivers in r339338, refresh the man pages with new and updated information. Reviewed by: sbruno@, 0mp@, jeffrey.e.pieper@intel.com, manpages Approved by: re (gjb@, kib@) Sponsored by: Intel Corporation Differential Revision: https://reviews.freebsd.org/D15927
139 lines
4.7 KiB
Groff
139 lines
4.7 KiB
Groff
.\" Copyright (c) 2013-2018, Intel Corporation
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions are met:
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.\"
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.\" 1. Redistributions of source code must retain the above copyright notice,
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.\" this list of conditions and the following disclaimer.
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.\"
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" 3. Neither the name of the Intel Corporation nor the names of its
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.\" contributors may be used to endorse or promote products derived from
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.\" this software without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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.\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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.\" LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" * Other names and brands may be claimed as the property of others.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd October 5, 2018
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.Dt IAVF 4
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.Os
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.Sh NAME
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.Nm iavf
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.Nd "Intel Adaptive Virtual Function driver"
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.Sh SYNOPSIS
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To compile this driver into the kernel, place the following lines in your
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kernel configuration file:
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.Bd -ragged -offset indent
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.Cd "device iavf"
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.Ed
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.Pp
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To load the driver as a module at boot time, place the following lines in
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.Xr loader.conf 5 :
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.Bd -literal -offset indent
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if_iavf_load="YES"
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.Ed
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.Sh DESCRIPTION
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The
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.Nm
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driver provides support for the PCI Virtual Functions from the 700 Series of
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ethernet devices and newer product families.
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The driver supports Jumbo Frames, TX/RX checksum offload,
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TCP segmentation offload (TSO), Large Receive Offload (LRO), VLAN
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tag insertion/extraction, VLAN checksum offload, VLAN TSO, and
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Receive Side Steering (RSS), all for both IPv4 and IPv6.
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For further hardware information and questions related to hardware
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requirements, see
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.Pa http://support.intel.com/ .
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.Pp
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Support for Jumbo Frames is provided via the interface MTU setting.
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Selecting an MTU larger than 1500 bytes with the
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.Xr ifconfig 8
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utility configures the adapter to receive and transmit Jumbo Frames.
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The maximum MTU size for Jumbo Frames is 9706.
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.Pp
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Offloads are also controlled via the interface, for instance,
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checksumming for both IPv4 and IPv6 can be set and unset, TSO4
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and/or TSO6, and finally LRO can be set and unset.
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.Pp
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For more information on configuring this device, see
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.Xr ifconfig 8 .
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.Pp
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.Em NOTE :
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This
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.Nm
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driver is only for Virtual Functions.
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For 700 series Physical Functions, use the
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.Xr ixl 4
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driver.
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.Sh LOADER TUNABLES
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Tunables can be set at the
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.Xr loader 8
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prompt before booting the kernel or stored in
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.Xr loader.conf 5 .
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.Bl -tag -width indent
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.It Va hw.iavf.rx_itr
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The RX interrupt rate value, set to 62 (124 usec) by default.
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.It Va hw.iavf.tx_itr
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The TX interrupt rate value, set to 122 (244 usec) by default.
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.It Va hw.iavf.enable_head_writeback
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When the driver is finding the last TX descriptor processed by the hardware,
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use a value written to memory by the hardware instead of scanning the
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descriptor ring for completed descriptors.
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Disabled by default; this mimics the "legacy" TX behavior found in
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.Xr ixgbe 4 .
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to ensure compatibility with future, non-700 series VF devices.
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.El
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.Sh SUPPORT
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For general information and support,
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go to the Intel support website at:
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.Pa http://support.intel.com/ .
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.Pp
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If an issue is identified with this driver with a supported adapter,
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email all the specific information related to the issue to
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.Mt freebsd@intel.com .
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.Sh SEE ALSO
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.Xr arp 4 ,
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.Xr ixl 4 ,
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.Xr netintro 4 ,
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.Xr vlan 4 ,
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.Xr ifconfig 8 ,
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.Xr iflib 9
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.Sh HISTORY
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The
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.Nm
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device driver first appeared in
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.Fx 10.1 .
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under the name "ixlv"
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It was converted to use
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.Xr iflib 9
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and changed to its current name in
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.Fx 12 .
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.Sh AUTHORS
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.An -nosplit
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The
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.Nm
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driver was written by
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.An Jack Vogel Aq Mt jfv@freebsd.org
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and
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.An Eric Joyner Aq Mt erj@freebsd.org .
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.Sh CAVEATS
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This driver is supposed to function on VFs spawned from future network devices by Intel,
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but at the time of this writing, has only been tested on the 700 series VFs.
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